Sylvania



(No Model.)

' L. T. STANLEY.

ELEGTRIG SWITUH.

No. 501,450. Patented July 11, 1893.

UNITED STATES PATENT OEEIcE.

LUCIUS T. STANLEY, OF BROOKLYN, NE W YORK, ASSIGNOR TO THE CUTTERELECTRICAL AND MANUFACTURING COMPANY, OF PHILADELPHIA, PENN- SYLVANIA.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 501,450, dated July 11,1893.

Application filed March 2'7, 1898- Serial No. 467,678- (No model.)

To aZZ whom it may concern.-

Be itknown that I,LUo1Us T. STANLEY, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York,

5 have invented certain new and useful Improvements in ElectricSwitches,of which the following is a specification, reference being hadto the drawings accompanying and forming a part of the same.

[0 This invention is an improvement in automatic electric switches, moreespecially designed for use with incandescent lamps.

The construction of the switch mechanism is designed and adapted forsuch purposes as the following: In a chamber, closet or apartment of anykind where incandescent or electric lamps are located, it is oftendesirable that the lights should be broughtinto action upon the openingof the door through which access to the chamberis afforded, and shutoffwhen the door is closed. This is the case with dark closets, bankvaults, or with houses where the plan is applicable as a protectionagainst burglars.

Theimprovement resides, therefore, in a switch mechanism that isoperated or controlled in its operation by the opening and closing of adoor.

In carrying out my invention I have adopted a form of switch in whichthe principle of op eration of a switch heretofore designed and used byme is embodied, but so modified as to adapt it to the specialrequirements of the application, and combined with certain parts 3 5necessary for its automatic and certain operation.

The improvement is shown in the accompanying drawings, in which- Figure1 is a view partly in side elevation and partly in section of the deviceas applied to actual use, and closed, and Fig. 2 is a similar View ofthe same when the circuit is open.

A represents the jamb of a door which is recessed to contain the switchmechanism.

B is a face plate set flush in the jamb and covering the recess. Throughthis plate works freely a plunger or puslbbutton C, and I prefer, forthis purpose, to form the plate with a socket D, extendinginto therecess and in which the plunger C works. The plunger is provided with arounded head similar to those in push-buttons, and a shoulder or head Eon the end within the recess. Between the rear of socket and the buttonisa spiral spring F or other device of a similar kind that tends toforce the plunger to the full extent of its play or movement, out of thesocket in which it is contained. \Vithin the recess in the door jamb aplate or arm G of metal is pivoted to a metal plate H that forms oneterminal of the 6b circuit containing the lamps or other devices in thechamber. The other terminal isapair of jaws or a simple plate K, withwhich the arm G may be swung into contact. A short length of a flatsteel spring L, such as a piece 6 of watch spring, is secured byits endsto studs on the head E and arm G respectively, the length of the springbeing preferably greater than the greatest distance between the twopoints of attachment, so that whatever posi- 7o tions the plunger andarm may occupy the spring will be bowed.

M represents the door, the edge of which is brought up to or carriedaway from the jamb by closing or opening it. \Vhen the door is closedthe button C is forced back into the socket D against the force of thespring E. The backward movement of the plunger carries one end of thespring L across the line joining the fulcrum of the arm G and the pointthereon at which the other end of the spring is secured. As a result thearm is thrown toward the plunger or in a position to break circuit, asshown in Fig. 2. On the other hand, when the door is opened the arm G isshifted by the superior force of spring F over the spring L and thecircuit closed. By changing the position of the plate K the opposite tothis may be caused to occur; that is to say, when the door is opened thecircuit will be closed, and when shut the circuit will be opened. Thismight be desirable in some cases.

What I claim is 1. The combination witha door of a contact 5 terminaland a pivoted contact arm in a recess in the jamb of the door, apush-button or plunger in position to be forced into the recess by theclosing of the door, a spring acting to return the plunger when the dooris opened and I00 a spring adapted to throw the contact arm into or outof engagement with the terminal, the action or operation of said springbeing dependent upon a movement in either direction of the plunger, asset forth.

2. The combination with adoorofacontact terminal and a pivoted contactarm in a recess in the jamb of the door, a plunger in position to beforced into the recess by the closing of the door, a spring acting toreturn the plunger when the door is opened and a flat spring connectedto the end of the plunger and the pivoted contact arm respectively,whereby in the movement of the plunger the said arm will be shifted bythe reaction of the spring, as set 15

